Source code for PIL.ImtImagePlugin

#
# The Python Imaging Library.
# $Id$
#
# IM Tools support for PIL
#
# history:
# 1996-05-27 fl   Created (read 8-bit images only)
# 2001-02-17 fl   Use 're' instead of 'regex' (Python 2.1) (0.2)
#
# Copyright (c) Secret Labs AB 1997-2001.
# Copyright (c) Fredrik Lundh 1996-2001.
#
# See the README file for information on usage and redistribution.
#


import re

from . import Image, ImageFile

#
# --------------------------------------------------------------------

field = re.compile(rb"([a-z]*) ([^ \r\n]*)")


##
# Image plugin for IM Tools images.


[docs]class ImtImageFile(ImageFile.ImageFile): format = "IMT" format_description = "IM Tools" def _open(self): # Quick rejection: if there's not a LF among the first # 100 bytes, this is (probably) not a text header. buffer = self.fp.read(100) if b"\n" not in buffer: raise SyntaxError("not an IM file") xsize = ysize = 0 while True: if buffer: s = buffer[:1] buffer = buffer[1:] else: s = self.fp.read(1) if not s: break if s == b"\x0C": # image data begins self.tile = [ ( "raw", (0, 0) + self.size, self.fp.tell() - len(buffer), (self.mode, 0, 1), ) ] break else: # read key/value pair if b"\n" not in buffer: buffer += self.fp.read(100) lines = buffer.split(b"\n") s += lines.pop(0) buffer = b"\n".join(lines) if len(s) == 1 or len(s) > 100: break if s[0] == ord(b"*"): continue # comment m = field.match(s) if not m: break k, v = m.group(1, 2) if k == b"width": xsize = int(v) self._size = xsize, ysize elif k == b"height": ysize = int(v) self._size = xsize, ysize elif k == b"pixel" and v == b"n8": self.mode = "L"
# # -------------------------------------------------------------------- Image.register_open(ImtImageFile.format, ImtImageFile) # # no extension registered (".im" is simply too common)